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Joyce boots protect the screw from dust and dirt, help maintain proper lubrication, and
guard against moisture and corrosive contaminants. They are fabricated of neoprene-coated
nylon.
Other materials are available for applications involving temperatures below -40°F and above
500°F, highly corrosive atmospheres and other special conditions.
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Upright Machine Screw Jacks
| Type 1,3 or 4 |
Type 2 |
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Inverted Machine Screw Jacks
| Type 1,3 or 4 |
Type 2 |
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NOTE: Adding a protective boot increases closed height. The closed height of Type
2 Upright Jacks remains the same up to a maximum travel given in the chart below.
NOTE: Up to 24" travel, standard boots are sold in 3" increments.
* Closed height given must be be increased 5/64" for each 1" of travel.
** Type 2 closed height must be increased 5/64" for each additional 1" of travel over
maximum travel given.
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